Machine for making hollow ware from pulp



J. B. YOUNG.

MACHINE FOR MAKING HOLLOW WARE FROM PULP.

APPLICATION FILED NOV. 1, I919.

Patented Feb. 8, 1921.

INVENTOR.

34,: ATTORNEY;

' UNITED STATES PATENT OFFICE.

.mcxson a. round, or onxmnn, cnmromnn.

URINE FOR MAKING HOLLOW WARE FROM PULP.

Specification of Letters Patent.

Patented Feb. 8, '1921.

Application filed November 1,1919. Serial No. 834,926.

tion is to provide fora machine for making.-

hollow ware from pulp, a shell containing:

rigid or stationary fingers; for pressing. the

stationary fingers 3, into the open rame-' material against the Wall of. the outer-"mold. This rigid finger shell is a siinpleaiid efii'-. cient one, permitting water .f'1'jee accessthrough it at all times; 'i-

Another object of thef in vention' is-'the..*, provision of a skeleton framework forsilp-"ljiat'ed yithe arrows in Fig. 1, and since it. porting the rigid finger shelL There ,is'n'og danger of this framework being cloggedup, since the water has a free passagethrough a'pperforat'ed. tube is used instead of said it at all times.

Other important and incidental objects will be brought out in the following specification, and particularly set forth in the subjoined claims. 7

' Referring to the accompanying drawings, Figure 1 is an elevational view, partly in section, of my improved machine for making hollow ware from pulp. Fig. 2 is a side elevational view of the cam and follower mechanism for the compression sleeve. Fig. 3 is a side elevational view of the shell having the rigid fingers. Fig. 4. is a perspective view of the skeleton frame for supporting the latter shell. And Fig. 5 is a top plan view of said skeleton frame.

Throughout the specification and drawings similar reference characters denote corresponding parts.

Referring to the accompanying drawings, the numeral 1 designates an outer mold which has the tapering shape of an invertedtruncated cone. The numeral 2 designates the inner mold which comprises a series of rigid or stationary fingers 3 that project downwardly from a head 4 in the form of an inverted truncated cone. These rigid fingers are disposed a sufficient distance apart for the drainage of the excluded water surplus from the material. This water enters a skeleton framework 6 also of the shape of an inverted truncated cone, and having a ring top 7 that is firmly secured within the hollow head portion 4 of the inner mold.

For carrying and operating the inner mold, an axis rod 8 is. provided, said rod pro ectln from the head portion of said inner mo d upwardly to a point where it is pivotally connected by a connecting rod 9 to a double crank 10. By the latter the inner mold is forced into the outer one, to

- compress the material in the intervening mold space, as described in in former Patent N 0. 1,244,820 granted Octo or 30th, 1917.

" The water which is excluded from said ma- 'terial is aflorded a free outlet throu h the work. 6, whence. it passes downwardly through the open ring partitions 11 and 12 ;.of the-;lat ter, into a water outlet tube 13.

The course of this excluded water isdelinepasses downwardly through the 0 on frameframework. The rig-id fingers 3 not only permit the. excluded sur lus water a free passage 111130 the ,open ramework 6, but allow" the cleaning water to spread through them to dislodge any particles of adhering material. They also act as a sieve to admit air to break the more or less intimate contact of the fingers and the molded product.

For the purpose of subjecting the pulp that forms the bottom portion of the bottle, or its upper portion as it is held in the mold, to the same pressure as the lower part, the following means are provided. Surrounding the upper portion of the inner mold 2 is a ring sleeve 14 which is started down the pulp after the inner mold begins to descend into the outer one, by the following device. Referring to Figs. 1 and'2, the numeral 16 designates the crank shaft'for the crank 10. Each web portion 17 of the latter is preferably bulb shaped in cross section, so that there may be firmly secured thereto an elliptic cam 18 with whose circumference a follower 9 carried by the upper end of a compression rod 20, is in engagement'. The upper end of each compression rod 20 is pivotallysecured to a crank arm 21 on a shaft 22, by a pin 23, while the lower end of each rod is pivotally secured to said sleeve 14. The follower 23 is always .held in engagement with the cam 18 by a means for accomplishing by the. compression ro s carrying'the- I through an inlet tube 30, the force of thin its pressure for the purpose of assistin I theframe in whichthe shaft 22 is journaled, while its other end exerts an upward pressure on the rockeraim 21. e Any other be employed if desired. In operation, as the innermold 2'beg1ns to descend into the outer mold 1, the cam 18 on each web portion of the crank 10 will begm to assume aposition to press upon v the follower l9;-.and afterthe mold 1s well on its downward movement, the curved surfaceof the cam, will gradually fore the follower downwardly to press the rig .sleeve 14 against theupper portion of the pulp 15. In other words, the mner mold' is the first to go down, being followed by the ring sleeve '14 which some time thereafter is pressed against the top ortionof the pulp followers 19. The sleeve 14, which is the last to go down, is also the last to ascend after the bottle: is formed, since the crankv 1O must'make a substantial movement before the surface of thecam permitsan upward movement to its respective compression rod upon which an u ward pressure is, continually exerted by t espring 24. 'It is therefore possible by these means to form the bottom portion of the bottle as perfectly as its middle and upper'part.

For the purpose of assistingin removing the pulp after being formed into a bottle,

compressed air is'admitted to the lower portionof the mold 1 past a puppet valve 25 whichis pressed against a seat 26 in the lower end of said mold, by a spring 27 that.

surrounds the stem of said valve between its lower protuberant portion 28 and the bottom of said mold. Now when the inner mold is elevated after the forming o eration, compressed air is admitted to a 0 am- 1 her 29 surrounding the stem of the valve,

air being sufficient to raise. the valve from its seat against the tension ofthe spring 27. The air is then afiorded' entrance to the lower portion of the mold 1 to contribute 1n the operation of removing the formed ttle from said mold. '(See Fig. 1.)

Having described my invention, I claim:

1. A device of thetype described compris- I ing atapered outer mold, and a tapered inner mold movable into and out of the outer mold, and formed of a circumferential series of'rigid fingers.

2. A device of the type described com- I prising a tapered outer mold; a tapered inner mold movable into and out of theouter mold and composed of a circumferential series of fingers, and a skeleton frame within said inner mold, for draining the water.

excluded between said fingers from the pulp.

3. A device ofthe type described com-f prising a tapered outer mold, a tapered inthis purpose, may.

ner mold movable into and' out of the outer mold and composed of a circumferential series 'of fingers, a skeleton frame; within said inner mold, and ring said frame throu h wh1c the water exsmay freely drain.

4. A device ofthe type described mprising a tapered outer mold, a tapered inner mold movable into and out of the outer artitions within eluded between said fingers from the pulp,

mold and composed of a circumferential,

series of fingers, a tapered skeleton frame within said inner mold,-an outlet tube in communication with the lower-end of said frame, and ring partitions within said frame through which the water excluded between the fingers from the pulp, may freely drain into the outlet tube.

- 5. A device of the type described'comprising a tapered outer mold, a tapered in: ner mold movable into and out of the outer mold and composed of a circumferential series of fingers, and'a valve in the'b'ottom of the outer mold, adapted to admit com+ grassed air-thereto for the purpose specie #6. -A device of the type described, comprising a tapered outer mold, a tapered inner mold movable into and out of the outer I type described, comprising a tapered outer mold, a tapered in-- ner mold, means'for'forcing the latter into and out of the outer mold to compress the material in the intervening mold space, andmeans controlled by said forcingmeans to press down'upon the top portion of said material for the purpose specified.

prising a tapered outer mold, atapered inner mold, a crank for moving the latter into I and out of the outer mold to compress the material in the intervening mold space, a

. 1 8. A device'of the type described, comcam carried by said crank, and means adapted to be pressed by the cam, upon the top portion of the material in the intervening I mold space, for the purpose specified.

9. A device of the type described, comprising a tapered outer mold, a-taperedin- ,ner mold, a crank for moving the latter into and out of the outer mold tocompress the 7 material in the intervening mold space, a sleeve surroundingthe top portion of the inher mold and adapted to press upon the top portion of the material in the mtervenin mold space, and means connected to' sai crank for forcing the sleeve 9. inst said ma terial after the inner mold li as descended into the outer one, and for Withdrawing said; inner mold before said sleeve is raised above said material. 7

10. A device of the type described, comprising a tapered outer mold, a tapered inner mold, a crank for moving the latter into and out of the outer mold to compress the material in the intervening mold space, a sleeve surrounding the top portion of the inner mold and adapted to press upon the top portion of the material in the intervening mold space, a connecting rod secured to thetop portion of said sleeve, a follower carried by the upper end of said connecting rod, and an elliptical cam carried by said 15 crank for engaging said follower to force the sleeve into contact With the top portion of said material, after the inner mold has descended Well into the outer mold.

In testimony whereof I have hereunto set 20 my hand this 25th day of October, 1919.

JACKSON B. YOUNG. 

